GetFeatureInfo using a Bounding Box CQL filter doesn't return any result or error

Question

Stack:

OpenLayers 8.2.0, Typescript 5.3.3, GeoServer 2.22

Goal:

Use an OpenLayers Extent ([minx, miny, maxx, maxy]) with getFeatureInfoUrl to run a GetFeatureInfo query to Geoserver and get back the info of all the features intersected by the extent. I tried with Geometric filters in CQL but it's not mandatory.

Code:

async function getFeatureInfo(layerList: string | undefined, coords: Array<number>, bbox: number[] | undefined) {
  // if no layers displayed, do nothing
  if (!layerList) return;
  const wmsSource = new TileWMS({
    url: GEOSERVER_URL, serverType: "geoserver", params: { LAYERS: layerList, QUERY_LAYERS: layerList }
  });
  const resolution = map.getView().getResolution();
  const projection = map.getView().getProjection();

  let url: string | undefined;
  // if bbox != undefined, it's a query with a bbox, otherwise it's a query with a point
  if (bbox) {
    url = wmsSource.getFeatureInfoUrl(
      getCenter(bbox),
      resolution,
      projection,
      {
        INFO_FORMAT: "application/json",
        FEATURE_COUNT: 100,
        cql_filter: `BBOX(geom, ${bbox.join(',')} )`
      });
  } else {
    url = wmsSource.getFeatureInfoUrl(coords, resolution, projection, { INFO_FORMAT: "application/json", FEATURE_COUNT: 100 });
  }

  if (url) {
    return (await Axios.get(url)).data;
  }
}

Issue:

The point selection is working great but not the bbox selection. Ain't got any data in the response neither any error message so I don't know if it's in the OpenLayers' side or in the GeoServer' side. I've read old posts and other more recent about similar issues but didn't understood what was wrong...

EDIT:

I changed the source from TileWMS to ImageWMS but I still get an empty response with a incoherent bbox in my request:

QUERY_LAYERS: geoserver:grid
INFO_FORMAT: application/json
REQUEST: GetFeatureInfo
SERVICE: WMS
VERSION: 1.3.0
FORMAT: image/png
STYLES: 
TRANSPARENT: true
LAYERS: geoserver:grid
FEATURE_COUNT: 100
cql_filter: BBOX(geom, 186301.81,5824496.35,221462.13,5858713.41)
I: 50
J: 50
WIDTH: 101
HEIGHT: 101
CRS: EPSG:3857
BBOX: -6702148.56,-1064425.65,7109912.51,12747635.42

Answer 1

I suspect you want to make a WFS GetFeature request with a BBOX parameter instead of a WMS GetFeatureInfo request which is intended to get info at point.

See GeoServer WFS GetFeature docs, search for BBOX.